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has been cited by the following article:

• TITLE: Short-Term Effects of Ozone and PM2.5 on Mortality in 12 Canadian Cities

  AUTHORS: Nawal Farhat, Tim Ramsay, Michael Jerrett, Daniel Krewski

  KEYWORDS: Air Pollution; Ozone; Particulate Matter; Mortality; Canada

  JOURNAL NAME: Journal of Environmental Protection, Vol.4 No.12A, December 18, 2013

  ABSTRACT: Numerous recent epidemiological studies have linked health effects with short-term exposure to air pollution levels commonly found in North America. The association between two key pollutants—ozone and fine particulate matter— and mortality in 12 Canadian cities was explored in a time-series study. City-specific estimates were obtained using Poisson regression models, adjusting for the effects of seasonality and temperature. Estimates were then pooled across cities using the inverse variance method. For a 10 ppb increase in 1-hr daily maximum ozone levels, significant associations were in the range of 0.56% - 2.47% increase in mortality. For a 10 μg/m3 increase in the 24-hr average PM2.5 concentration of, significant associations varied between 0.91% and 3.17% increase in mortality. Generally, stronger associations were found among the elderly. Effects estimates were robust to adjustment for seasonality, but were sensitive to lag structures. There was no evidence for effect modification of the mortality-exposure association by city-level ecologic covariates.